Suspension woes - Page 2

Bruces · 04-01-2019, 08:16 AM

The dual rate spring takes the place of the spring in the top .The fork lowers have no springs ,just a hydraulic valve called a damper ,that has different sized orifices in it to control the rate the fluid gets moved around as the fork cycles altering the way the fork reacts .

buz100 · 04-01-2019, 08:59 AM

I don't think I asked my question well:

I was confused about the orientation of the spring. It looks like one end is more tightly wound than the other. Does it matter which way it goes in?

jimwildman · 04-01-2019, 03:14 PM

Quote:

Originally Posted by buz100

I don't think I asked my question well:

I was confused about the orientation of the spring. It looks like one end is more tightly wound than the other. Does it matter which way it goes in?

In theory it does not matter if the tighter part of the coil is up or down.

Megadan · 04-01-2019, 06:37 PM

It doesn't matter. Some would argue theories about the tighter wind having more mass per given measure needing to be up top to reduce inertia, but even if this is true the effect is so small you couldnt tell the difference.

Bruces · 04-01-2019, 07:10 PM

Sorry ,I thought you bought a replacement spring .

OneLeggedRider · 04-02-2019, 05:41 AM

Sprung and Unsprung weight 101.

Unsprung weight is the lower half of your forks, brake disc and caliper, and entire front wheel/tire/axle assembly. Same for the rear wheel/tire/axle assembly, brake and caliper, the swingarm up to the shock mount or half the arm, whichever distance is greater, and the lower half of the monoshock. All the rest of the bike is considered Sprung weight.

The less Unsprung weight you have the better the bike will handle/steer/ride/jump etc.. And this applies to all motorcycles, street and offroad. More rigidity wasn't the only reason manufacturers went to USD forks and lighter slotted braking systems.

So to answer your question yes, the tightly wound portion of the spring goes to the top of the fork. As Megadan mentioned above, will it really matter on this little bike that that only has a top speed of 60mph? Probably not, but if you got a chance to do it right why wouldn't you?

buz100 · 04-04-2019, 08:20 PM

Got it all put back together, having a hard time getting the bottom fork bolt back on tightly. Bolt spins with internal damper rod. Any advice here? Is it OK to hit it with a impact or should I try something else?

Bruces · 04-04-2019, 08:36 PM

That’s what the broom handle is for .Apply some pressure with the broom handle to stop the damper from turning .

buz100 · 04-04-2019, 09:14 PM

Quote:

Originally Posted by Bruces

That’s what the broom handle is for .Apply some pressure with the broom handle to stop the damper from turning .

Gotcha, thank you. Do these need to be on as white-knuckle tight as they came from the factory? It seemed a little overkill.

Bruces · 04-04-2019, 09:34 PM

You certainly don’t want to have them unthread ,but they do not need to be gorilla tight .

04-01-2019, 06:37 PM	#19
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 7,978	It doesn't matter. Some would argue theories about the tighter wind having more mass per given measure needing to be up top to reduce inertia, but even if this is true the effect is so small you couldnt tell the difference. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
	1

04-01-2019, 08:16 AM	#16
Bruces Join Date: May 2018 Posts: 1,572	The dual rate spring takes the place of the spring in the top .The fork lowers have no springs ,just a hydraulic valve called a damper ,that has different sized orifices in it to control the rate the fluid gets moved around as the fork cycles altering the way the fork reacts .
	0

04-01-2019, 08:59 AM	#17
buz100 Join Date: Feb 2019 Posts: 19	I don't think I asked my question well: I was confused about the orientation of the spring. It looks like one end is more tightly wound than the other. Does it matter which way it goes in?
	0

04-01-2019, 07:10 PM	#20
Bruces Join Date: May 2018 Posts: 1,572	Sorry ,I thought you bought a replacement spring .
	0

04-02-2019, 05:41 AM	#21
OneLeggedRider Join Date: Nov 2018 Location: Stockport, Oh. Posts: 1,442	Sprung and Unsprung weight 101. Unsprung weight is the lower half of your forks, brake disc and caliper, and entire front wheel/tire/axle assembly. Same for the rear wheel/tire/axle assembly, brake and caliper, the swingarm up to the shock mount or half the arm, whichever distance is greater, and the lower half of the monoshock. All the rest of the bike is considered Sprung weight. The less Unsprung weight you have the better the bike will handle/steer/ride/jump etc.. And this applies to all motorcycles, street and offroad. More rigidity wasn't the only reason manufacturers went to USD forks and lighter slotted braking systems. So to answer your question yes, the tightly wound portion of the spring goes to the top of the fork. As Megadan mentioned above, will it really matter on this little bike that that only has a top speed of 60mph? Probably not, but if you got a chance to do it right why wouldn't you?
	0

04-04-2019, 08:20 PM	#22
buz100 Join Date: Feb 2019 Posts: 19	Got it all put back together, having a hard time getting the bottom fork bolt back on tightly. Bolt spins with internal damper rod. Any advice here? Is it OK to hit it with a impact or should I try something else?
	0

04-04-2019, 08:36 PM	#23
Bruces Join Date: May 2018 Posts: 1,572	That’s what the broom handle is for .Apply some pressure with the broom handle to stop the damper from turning .
	0

04-04-2019, 09:34 PM	#25
Bruces Join Date: May 2018 Posts: 1,572	You certainly don’t want to have them unthread ,but they do not need to be gorilla tight .
	0